Was This A Jazz Band ?

No. It was not.

Not really - a rock band with some jazz influences.  Pretty ground breaking in some ways.

My former classical guitar teacher played with them on one song in Cleveland - they had one tune that required a classical guitarist, and rather than bring one along on tour, they just hired one in each town on the tour.  I tease him about being a rock star, because he only relates to the guitar as a classical instrument!